You are using a three-point estimate for a project activity. The estimates are: optimistic=10, most likely=20, pessimistic=30. What is the activity's standard deviation?
A-20
B-3.33
C-10
D-6
Posted By: MCQSEXAM
Project Management / Project Management Professional
The standard deviation for a PERT estimate is (Pessimistic - Optimistic) / 6. (30 - 10) / 6 = 20/6 = 3.33.